add "create configuration" support for SH hosting in orders and subs

[charcey]

Related Issue(s):

Closes #

Proposed Changes:

For inclusion in changelog (if applicable):

1. create_configuration for Sentinel Hub hosting supported in Orders and Subscriptions Python SDK
2. --create-configuration for Sentinel Hub hosting supported in Orders and Subscriptions CLI

Not intended for changelog:

Diff of User Interface

Old behavior:

New behavior:

• Extra optional parameter of create_configuration in:
  • planet.subscription_request -> build_request
  • planet.order_request -> build_request
• Extra optional option of --create-configuration in:
  • planet orders request
  • planet orders create
  • planet subscriptions request
  • planet subscriptions create

Note: create configuration and collection id are mutually exclusive but I have chosen to clean on the API to validate and not do that client side. So a request can be built successfully that will fail when submitted to the API.

PR Checklist:

• This PR is as small and focused as possible
• If this PR includes proposed changes for inclusion in the changelog, the title of this PR summarizes those changes and is ready for inclusion in the Changelog.
• I have updated docstrings for function changes and docs in the 'docs' folder for user interface / behavior changes
• This PR does not break any examples or I have updated them

(Optional) @mentions for Notifications:
@pl-gideon